Re: Potential problem in diadic iota (⍳) or in Pick (⊃)

[Kacper Gutowski]

Indeed, as Christian wrote, the fix is not sufficient.  But I still 
believe it's in the branch I previously mentioned as commenting out the 
whole optimization by flipping #if 1 to 0 at PrimitiveFunction.cc:319 
fixes it as far as I can see (at cost of performance of course).

Other examples in the same vein still failing at r1334:

      A←64?64 ⋄ B←⍳6 ⋄ B≡A[A⍳B]         ⍝ this should be 1
0
      A←3×⍳64 ⋄ B←⍳6 ⋄ B≡A[A⍳B]         ⍝ this should be INDEX ERROR
0
      A←⎕IO+64|3×⍳64 ⋄ B←⍳6 ⋄ B≡A[A⍳B]  ⍝ this should be 1
0

-k